Brush comprising brush strips and holder therefor



Sept. 15, 1953 Filed May 28, 1947 w. A. LOMBARDI 2,651,798

BRUSH COMPRISING BRUSH STRIPS AND HOLDER ITHEREIFOR 2 Sheets-Sheet lINVENTOR ATTORNEYS Wil 1:13am ALom/baldf Sept. 15, 1953 w. A. LOMBARDI2,651,798

BRUSH COMPRISING BRUSH STRIPS AND HOLDER THEREFOR Filed May 28,-1947 2Sheets-Sheet 2 willmmlaf fia dz ATTORNEYS Patented Sept. 15, 1953 UNITEDSTATES PATENT OFFICE BRUSH COMPRISING BRUSIISTRIPS AND HOLDER THEREFORWilliam A.- Lombardi, Derby, $01111.

Application May 28, 1947,. Serial No. 750,928

(Cl. ju 183) 8 Claims; I

My invention relates to brushes, and in particular to supporting meansfor brushes composed of one or more strip-type brush elements.

It is an object. of my invention to provide an improved device of thecharacter indicated.

It is another object to provide an improved, adjustable, supporting andclamping means for more readily assembling. a brush of the characterindicated.

It is a general object to provide a simpler and less costlybrush-supporting structure having features which inherently make forlow-cost assembly in combination with brush elements, and for low-costmaintenance of assembled brushes.

Other objects and various further features of the invention will bepointed out or will occur to those skilled. in the art'from a reading ofthe following specification in conjunction. with the accompanyingdrawings. In said drawings:

Fig. l is a partially broken-away side view of a partially assembledbrush incorporating features of the invention; 7

Fig. 2 is a sectional view takenin. the plane 2-2 of Fig. 1;

Fig. 3 is an enlarged. sectional View taken. inthe plane 33 of Fig. 2;

Fig. 4 is a view similar to Fig. 3, with the parts relaxed just prior toa final clam-ping operation;

Fig. 5 is a perspective View of an element ofthe structure of Fig. 1;

Fig. 6 is an enlarged fragmentary view of an alternative constructionaccording to the invention;

Fig. 7 is a view similar to. Fig. 6 to illustrate a further alternativeconstruction;

Fig. 8 is a sectional view of another brush assembly incorporatingfeatures of the invention,

to receive parts of the brush elements, and the walls of the slots mayconverge towardthe open-- ings of the slots. Wedge means are providedfor effectively narrowing. the openings of the slots, whereby the brushbinders may be secured. to the support.

In one of the forms to be described, the sup-- porting assembly includesa; generally circular plate having a plurality of angularly spacedradially outwardly opening slots to receive a corresponding pluralityofv brush binders. Each of the slots is further defined by correspondingslots in brackets or clips mounted on one or both sides of the plate.Each bracket or clip has one face at an obtuse angle with a second face,and one of the faces has a converging slotted opening of the characterindicated. By clamping the other face of. the bracket or clip to theplate, the face. having the slot is wedged to a steeper angle with theplate, and the net result is effectivcly to narrow the opening of theslot, thus clamping the brush binder between the walls of the slot.

In another preferred form, the supporting member may comprise twogenerally circular plates each having more or less aligned radiallyoutwardly opening slots, and in this form eccentric means cooperatebetween the plates to dis place the plates angularly with respect toeach other, whereby the Walls of aligned slots are caused to converge.

Referring to Figs. 1 and 2' of the drawings, my invention. is shown inapplication to a drum-type brush assembly comprising a plurality ofangularly" spaced longitudinally extending brush-strip members It,supported and retained by a plu rality' of axially spaced supportingmembers it. Each of the supporting members IE3" preferably includes aboss or hub ii to engage a shaft (not shown), and each hub. Isl mayinclude a set screw l8 for securing the assembly to said shaft.

In accordance with afeature of the invention, each supporting member It"also includes a plate [9, which in the form shown is generally circular.The plate f9 may be formed with a plurality of brush-retaining slots 2:?to receive the binders 2i of. brush elements [5. In order to secure thebinders ii in their located positions within slots 2% means are providedfor eifectively converging the walls. defining said. slots. In the formshown, a pair of brackets or clips 22 are carried by theplate i9 foreach slot opening, that is, for each brushbinder ii to be secured to.the support i=6. Each bracket or clip 2? preferably cornprises a firstfacev 23. and. a second face 2 at an obtuse angle with. respect to eachother. One of these faces, say, the outer face 23, may be formed with anopening, such as a slot 25, defined by opposed walls. 26-'-2-'l havingconverging portions-towardthe opening of slot 2-5. The contourpresented'by walls 25 21 is preferably more or less in conformitywiththe cross-section of the brush binder 2|, with a slight clearance topermit ready insertion of the binder 2| in slot 25, and with theconvergent portions of the slot walls embracing or extending around thethickest part of the brush binder. Of course, the convergent portionscould embrace the upper edge of the brush binder, but in the form shownthe convergent section of the brush binder 2| permits the bracket orclip 22 to embrace the binder 2| securely without engaging the upperedge of the binder 2|. the bracket 22 may include suitable securingmeans for anchoring the same to a face of the plate l9. In the formshown, a hole 28 in the face 24 may loosely accommodate nut-and-bolt orother securing means 29 for attachment to the plate |9. Two brackets 22may be clamped by the same securing means 29 to the plate l9, for eachbinder 2| to be secured.

It will be clear, by reference first to Fig. 4 and then to Fig. 3, thatthe described assembly may be quickly effected by slidably insertingbrush binders 2| through the slots 25 of the appropriate brackets 22 andthrough the locating slots 20 on the support plates |9. With thebracket-securing means 29 relaxed (see Fig. 4), there may be ampleclearance for such sliding insertion. Once properly inserted andlocated, a simple take-up of the securing means 24 into, say, therelationship shown in Fig. 3 will forcibly increase the inclination ofthe outer bracket faces 23 with respect to the brush binder 2|, and atthe same time the convergence of the opposed slot walls 262'| will beeffectively narrowed. This narrowing, as produced by the securing means29, may very securely clamp binders 2| in their final positions.

In certain assemblies, particularly wherein a large plurality ofangularly spaced brush strips l may be required, say, when twice thenumber shown in Fig. 2 are needed, it may be desirable to form thebrackets or clips 22 with a greater number of slots. Such a constructionis illustrated in Fig. 6, wherein the'outer bracket face 23' is shownformed with two slots 30 having the same general proportion as the slots25 of the Fig. 1 arrangement. In the form shown in Fig. 6, a singlesecuring means 3| may serve the bracket 22' and hence a plurality ofbrush elements l5. If desired, the central axes of the slots 30 may beinclined with respect to each other as shown in Fig. 6, so as to promoteproper radial orientation of all brush elements l5.

In certain applications, particularly when the frictional or scouringforces to be encountered by brush elements I5 are not great, it may notbe necessary that the supporting plates IS include locating slots asdescribed for Fig. 1. In such cases, and with reference to Fig. 7, asupporting plate 32 may be entirely adequate. In the form shown, theplate 32 is formed with a continuous circular periphery, and the samebrackets or clips 22 may be employed with their slots embracing andlocking the brush binders 2|. It will be clear that in the form shown inFig. '7, the only forming operations needed for the supporting plate 32will be the provision of suitable holes to accommodate securing means 33and of appropriate means for attachment to bosses or hubs IE or to amounting'shaft (not shown).

In Figs. 8 and 9, I show another embodiment of the invention in whichalternative means are employed for effectively narrowing thebrushretaining slots in order to secure brush binders The other face 24ofv 4 tothe supporting structure. In the form shown, the supportingstructure comprises two plates 3435, which may have similar outerperipheries, each formed with a corresponding plurality of radiallyoutwardly opening slots 36 to receive brush binders 2|. Again, the wallsof the slots 36 are preferably such as to converge toward the openingsof the slots and to provide, when in general alignment, sufiicientclearance for the ready insertion of binders 2 In accordance with afeature of the invention, cam means are provided for relatively rotatingone of the plates 3435 with respect to the other of said plates. In theform shown, eccentric means 31 may effect such relative displacement.The eccentric means 31 may include a bearing portion 38 journalled, say,in the plate member 34, and an eccentric 39 to engage the other platemember 35. The bearing portion 38 may be formed integral with a cap 40to engage the side of plate 34 and with a shank 4| threadedly to receivea tightening nut 42. If desired, adjustable means such as a socket 43may be provided at the end .of shank 4|, whereby relative adjustment ofthe nut 42 and of the shank 4| may be effected from one side of thesupporting assembly. The eccentric 39 may be keyed to the member 49, asat 44, whereby an adjustment of the socket 43 may effect eccentricrotation. Once an eccentric setting has been made, the nut 43 may serveto tighten the assembly.

The eccentric 39 preferably engages a slot'45 in the plate 35, wherebyeccentric movement may impart only relative angular movement to theplates 34--35. The slot 45 thus preferably extends generally radially ofthe supporting assembly. If desired, the supporting assembly may be mademore rigid by the employment of securing means 46 angularly displacedabout the plate assembly. Preferably, the securing means 46 isassociated with the plates 3435 in such a way as to permit free angulardisplacement of these plates. Thus, if the securing means 46 is a screw,

. as shown, the shank of such screw preferably is slidable in an arcuateslot 41 in one of the plate members 34-35 through which it passes.

If desired, for purposes of enhancing the effectiveness of the completeassembly, a third plate member 48 may also be employed. In the formshown, and preferably, the third plate member 48 cooperates with theplate 34 to sandwich the plate 35 to be actuated by eccentric 39. Thethree-plate construction thus not only provides a simple means forretaining the eccentric means 31 but also an improved wedging action atslot 36, as will be clear.

' It will be clear that I have described a number of relatively simplestructures for very readily accommodating the assembly of brush elementsto form a drum-type brush. The brush elements of the assembly may bestraight, as shown and described, or they may be spiralled and held inspiralled relation by my supporting means. My supporting structures aresuch as to permit easy disassembly for servicing and for maintenance;for example, particularly in the case of brush assemblies in which thebrush elements are sufficiently spaced, screw drivers or wrenches may beheld and operated between supporter plates so as to effect bindingadjustments on the brush elements. By an extended use of sheet-metalconstruction, not only can the cost of producing the assembly bematerially reduced, but also the cost of producing a complete brushassembly.

While I have described my invention in detail for the preferred formsshown, it will be understood that modifications may be made within thescope of the invention as defined in the appended claims.

I claim:

1. In combination, a frame member, a brush strip to be secured to saidframe member, said brush strip having an elongated binder for bristles,a bracket member having a first face and a second face at an obtuseangle with respect to each other, said bracket having a binderreceivingslot in one of said faces, said slot being defined by opposed wallsconverging toward the opening of said slot, and securing means forclamping the other of said faces of said bracket to said frame member,said elongated binder being within said slot and held by the convergingwalls of said slot to said frame member.

2. A combination according to claim 1, in which said frame member alsohas a slot opening in the same general direction as the slot on saidbracket and generally aligned therewith, whereby the slot on said framemember may serve to locate a brush strip and the slot on said bracketmay serve to anchor said brush strip.

3. As an article of manufacture, supporting means for a brush assembly,said supporting means including an integral unitary generally circulardisc plate having a plurality of angularly spaced radially outwardlyopening slots, said slots being of fixed widths and defined by opposedwalls converging toward the openings of said slots, and securing meanscarried by said plate for securing a brush strip in one of said slots,

said securing means including a plurality of independent members havingoutwardly opening slots with opposed convergent walls to receiveseparate brush strips held in separate disc slots, and independentadjustable means independently engaging said plate and said members foradjustably spacing corresponding slots on said members and on said platewhereby upon such adjustment brush strips may be secured to said plate.

4. In a generally cylindrical brush, a plurality of generally circulardiscs in spaced apart relationship, said discs having angularly spacedgenerally radially outwardly opening slots in the peripheries thereof,corresponding slots in said discs being in general alignment with eachother, said slots having reduced peripheral openings, brush stripshaving elongated binders for bristles and extending through said slotsin said discs and held against radial removal by the reduced slotopenings, and adjustable means engaging over parts of said binders foradjustably crowding said brush strips radially inwardly in said slots.

5. In the combination defined in claim 4, said means for crowding saidbrush strips radially in said slots being engaged with parts of saidbinders radially outwardly of the greatest transverse dimension thereof.

6. In the combination defined in claim 4, said means for crowding saidbrush strips radially in said slots comprising clips having slots forreceiving said binders, and means for securing said clips to said discs,said securing means driving the slotted parts of said clips radiallyinwardly upon take-up of said securing means.

'7. As an article of manufacture, a brush-strip anchoring device,comprising a bracket having a first face and a second face, said facesbeing at an obtuse angle with respect to each other, clamp-receivingmeans on one of said faces, the outer periphery of the other of saidfaces having a brush-binder-receiving slotted opening open outwardly tosaid outer periphery, confining means integral with opposed outer partsof the walls of the slotted opening and projecting toward each other andshort of closing off the slotted opening, whereby a brush binder may beclamped by reaction on the brush binder between both said confiningmeans on the one hand and the bottom of the slotted opening on the otherhand.

8. An article according to claim 7, in which the periphery of said otherface has a second brushbinder-receiving opening with integral confiningmeans as for said first-mentioned opening.

WILLIAM A. LONIBARDI.

References Cited in the file of this patent UNITED STATES PATENTS NumberName Date 656,761 Adams Aug. 28, 1900 887,780 Eberhardt May 19, 1908968,820 Vardell Aug. 30, 1910 991,876 Murray May 9, 1911 1,011,831Murray Dec. 12, 1911 1,018,327 Krupp Feb. 20, 1912 1,551,242 Dick Aug.25, 1925 1,815,644 Anderson July 25, 1928 1,981,674 Solomon Nov. 20,1934 2,028,694 Spinks Jan. 21, 1936 2,131,956 Jones July 24, 1937

